Train attendant supervisor Xu Ying provides service for passengers on a Beijing-Tianjin intercity train in Tianjin, north China, July 31, 2018. On Aug. 1, 2008, the Beijing-Tianjin high-speed train service opened China's first high-speed railway line. The daily frequency of Beijing-Tianjin intercity trains has increased from 94 one-way services to 217, with 250 million passengers carried in the past decade, according to the Beijing railway bureau. (Xinhua/Yang Baosen)